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WO1998003514A1 - Procede de preparation d'alcoxysilanes - Google Patents

Procede de preparation d'alcoxysilanes Download PDF

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Publication number
WO1998003514A1
WO1998003514A1 PCT/EP1997/003837 EP9703837W WO9803514A1 WO 1998003514 A1 WO1998003514 A1 WO 1998003514A1 EP 9703837 W EP9703837 W EP 9703837W WO 9803514 A1 WO9803514 A1 WO 9803514A1
Authority
WO
WIPO (PCT)
Prior art keywords
carbon atoms
alkoxysilanes
pressure
catalysts
transesterification
Prior art date
Application number
PCT/EP1997/003837
Other languages
German (de)
English (en)
Inventor
Richard Weidner
Walter Blueml
Original Assignee
Wacker-Chemie Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wacker-Chemie Gmbh filed Critical Wacker-Chemie Gmbh
Priority to US09/194,308 priority Critical patent/US6005132A/en
Priority to JP50655298A priority patent/JP3204987B2/ja
Priority to CA002258104A priority patent/CA2258104C/fr
Priority to EP97938829A priority patent/EP0915890B1/fr
Priority to AT97938829T priority patent/ATE190061T1/de
Priority to DE59701191T priority patent/DE59701191D1/de
Publication of WO1998003514A1 publication Critical patent/WO1998003514A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/04—Esters of silicic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
    • C07F7/1804—Compounds having Si-O-C linkages
    • C07F7/1872—Preparation; Treatments not provided for in C07F7/20
    • C07F7/188—Preparation; Treatments not provided for in C07F7/20 by reactions involving the formation of Si-O linkages

Definitions

  • the invention relates to a process for the preparation of alkoxysilanes by transesterification of alkoxysilanes having alkoxy radicals having 1 to 4 carbon atoms with higher alcohols in the presence of acidic or basic catalysts under reduced pressure.
  • WO 93/16085 discloses a process for the preparation of light-colored tetraalkoxysilanes, in a first step tetramethoxy- or ethoxysilanes being transesterified with primary higher alcohols in the presence of basic catalysts and in a subsequent step neutralization and bleaching are carried out using solid acidic bleaching earth and cation exchangers.
  • the second step which preferably lasts 1 to 2 hours, is necessary in this process, since the process leads to dark-colored tetraalkoxysilanes, which are undesirable, due to the procedure.
  • the process also has the disadvantage that the first step is very time-consuming, since, due to the procedure used to achieve a high degree of transesterification, the reaction mixture can only be heated at a heating rate of 0.1 to 0.5 ° C. per minute and moreover relatively high final temperatures are necessary.
  • Another disadvantage of the process is that the transesterification is carried out in a molar ratio of tetramethoxy or tetraethoxysilane to the primary alcohols, preferably from 1: 4.2 to 1: 4.8, and thus another, due to the high boiling point requires a complex purification step by distillation.
  • the invention relates to a process for the preparation of alkoxysilanes with alkoxy radicals having 6 to 38 carbon atoms by transesterification of alkoxysilanes whose alkoxy groups have 1 to 4 carbon atoms with higher linear and / or branched alcohols with 6 to 38 carbon atoms in the presence of basic or acidic catalysts at a pressure of 1 to 800 hPa and a temperature of 25 to 150 ° C and with constant removal of the alcohol formed with 1 to 4 carbon atoms, pressure and temperature being chosen during the transesterification so that the higher one used Do not boil alcohol or the silanes.
  • silanes should also be understood to mean mixtures of silanes and their partial hydrolysates with a maximum of 5 silicon atoms, such partial hydrolyzates preferably not or only in small amounts, such as e.g. up to 10 percent by weight, based on the silane, are present.
  • the alkoxysilanes used according to the invention whose alkoxy groups have 1 to 4 carbon atoms, can be all alkoxysilanes known to date, such as silanes with 1, 2, 3 or 4 Si-bonded alkoxy groups, tetraalkoxysilanes having alkoxy groups having 1 to 4 carbon atoms preferred and tetramethoxysilane and tetraethoxysilane are particularly preferred.
  • the alkoxysilanes used according to the invention can be a single type or a mixture of at least two types of such alkoxysilanes.
  • the alcohols used according to the invention are linear and / or branched alcohols having 6 to 38 carbon atoms, which can be aliphatically saturated or unsaturated.
  • the alcohols used according to the invention are preferably aliphatically saturated alcohols having 8 to 20 carbon atoms, such as 1-n-octanol, 1-n-decanol, 1-n-dodecanol, 1-n-tetradecanol and mixtures of linear and branched alcohols with 13 to 15 carbon atoms, such as those commercially available under the name "C13-C15 alcohol” from BASF AG, Ludwigshafen.
  • the higher alcohols used according to the invention can be a single type or a mixture of at least two types of such alcohols.
  • alkoxysilanes whose alkoxy groups have 1 to 4 carbon atoms are used with higher alcohols with 6 to 38 carbon atoms in molar amounts of preferably 1: 4 to 1: 4.5, particularly preferably 1: 4.
  • Basic and acidic catalysts can be used as catalysts in the process according to the invention, basic catalysts being preferred.
  • Examples of basic catalysts are homogeneous catalysts, such as e.g. Alkali metal hydroxides, such as sodium hydroxide and potassium hydroxide, and alkali metal alcoholates, such as sodium fluoride, with sodium methylate being preferred.
  • Alkali metal hydroxides such as sodium hydroxide and potassium hydroxide
  • alkali metal alcoholates such as sodium fluoride, with sodium methylate being preferred.
  • acidic catalysts are homogeneous catalysts f such as hydrochloric acid, sulfuric acid and p-toluenesulfonic acid, and heterogeneous catalysts such as solid acidic cation exchangers and solid acid-activated bleaching earths, such as those of the montmorillonite type.
  • homogeneous catalysts f such as hydrochloric acid, sulfuric acid and p-toluenesulfonic acid
  • heterogeneous catalysts such as solid acidic cation exchangers and solid acid-activated bleaching earths, such as those of the montmorillonite type.
  • the homogeneous catalysts are used in amounts of preferably from 0.01 to 1.5 percent by weight, particularly preferably from 0.05 to 1 percent by weight, and the heterogeneous catalysts are preferably from 1 to 20 percent by weight, particularly preferably from 5 to 15 Weight percent, based on alkoxysilane used with 1 to 4 carbon atoms having alkoxy radicals used.
  • the process according to the invention is carried out at a temperature of preferably 30 to 140 ° C.
  • the process according to the invention is carried out at a pressure of preferably 5 to 300 hPa.
  • the pressure and temperature in the transesterification according to the invention should be chosen so that the alcohol which has 1 to 4 carbon atoms can be removed by distillation and the higher alcohol used and the silanes do not boil. It may prove advantageous to briefly reduce the pressure again at the end of the transesterification according to the invention, i.e. under the pressure selected during the transesterification in order to completely remove residual portions of the alcohol formed during the reaction.
  • homogeneous acidic and basic catalysts are used as catalysts in the process according to the invention, these are preferably neutralized after the transesterification has taken place, and the salt formed is preferably removed by filtration. Neutralization as such has been known for a long time, although it is of course possible to use the same acidic and basic compounds which were also listed above as catalysts.
  • heterogeneous catalysts are used as catalysts in the process according to the invention, they are removed from the reaction mass after the transesterification, for example by filtration.
  • the process according to the invention has the advantage that it is very simple to carry out, light-colored, preferably colorless, products having a very high, preferably 100%, degree of transesterification being produced in one process step, in a relatively short time and without a further purification step.
  • the iodine color number is determined according to DIN (.German .Industrie Norm) 6162.
  • the iodine color number is a measure of the degree of discoloration of a product and is the amount of iodine in mg in 100 ml of an aqueous solution, the color depth of which is the same as that of the product to be examined Corresponds to layer thickness.
  • Example 1 The procedure of Example 1 is repeated, but with the modification that ethyl alcohol formed in the reaction is distilled off at the pressure of the surrounding atmosphere, that is to say at about 1000 hPa. For this purpose, the reaction mixture must be heated to 170 ° C. within 6 hours. The mixture is then neutralized by adding 0.5 g of 20% hydrochloric acid in and the sodium chloride formed is filtered off.
  • a clear liquid with a viscosity of 20.7 mm / s, an HCl content of 0.5 ppm and an iodine color number of 2 is obtained. According to H-NMR investigations, the product still contains 13.2 mol% of Si-ethoxy groupings and 4.4 mol% of ethanol.
  • Example 2 The procedure of Example 2 is repeated, but with the modification that ethyl alcohol formed in the reaction at the pressure of the surrounding atmosphere, that is at about 1000 hPa, is distilled off.
  • the reaction mixture must be heated to 160 ° C. within 6 hours.
  • the pressure is briefly reduced to 40 hPa to remove residual portions of ethyl alcohol, the mixture is neutralized by adding 0.5 g of 20% hydrochloric acid and the sodium chloride formed is filtered off.
  • a clear liquid with a viscosity of 36.1 nm / s, an HCl content of 3 ppm and an iodine color number of 1 is obtained. According to H-NMR investigations, the product still contains approximately 0.2 mol% of Si-ethoxy groupings.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

L'invention concerne un procédé de préparation d'alcoxysilanes contenant des radicaux alcoxy comportant 6 à 38 atomes de carbone. Ledit procédé consiste à réaliser une transestérification d'alcoxysilanes, dont les groupes alcoxy comportent 1 à 4 atomes de carbone, avec des alcools supérieurs linéaires et/ou ramifiés comportant 6 à 38 atomes de carbone, en présence de catalyseurs basiques ou acides, à une pression de 1 à 800 hPa et une température de 25 à 150 °C, avec élimination constante de l'alcool produit, comportant 1 à 4 atomes de carbone. La température et le pression lors de la transestérification sont sélectionnées de manière que l'alcool supérieur utilisé et les silanes ne bouillent pas.
PCT/EP1997/003837 1996-07-23 1997-07-17 Procede de preparation d'alcoxysilanes WO1998003514A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US09/194,308 US6005132A (en) 1996-07-23 1997-07-17 Method of preparing alkoxy silanes
JP50655298A JP3204987B2 (ja) 1996-07-23 1997-07-17 アルコキシシランの製法
CA002258104A CA2258104C (fr) 1996-07-23 1997-07-17 Methode de preparation d'alcoxysilanes
EP97938829A EP0915890B1 (fr) 1996-07-23 1997-07-17 Procede de preparation d'alcoxysilanes
AT97938829T ATE190061T1 (de) 1996-07-23 1997-07-17 Verfahren zur herstellung von alkoxysilanen
DE59701191T DE59701191D1 (de) 1996-07-23 1997-07-17 Verfahren zur herstellung von alkoxysilanen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19629760.5 1996-07-23
DE19629760A DE19629760A1 (de) 1996-07-23 1996-07-23 Verfahren zur Herstellung von Alkoxysilanen

Publications (1)

Publication Number Publication Date
WO1998003514A1 true WO1998003514A1 (fr) 1998-01-29

Family

ID=7800636

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/003837 WO1998003514A1 (fr) 1996-07-23 1997-07-17 Procede de preparation d'alcoxysilanes

Country Status (7)

Country Link
US (1) US6005132A (fr)
EP (1) EP0915890B1 (fr)
JP (1) JP3204987B2 (fr)
AT (1) ATE190061T1 (fr)
CA (1) CA2258104C (fr)
DE (2) DE19629760A1 (fr)
WO (1) WO1998003514A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070528A1 (fr) * 2001-03-02 2002-09-12 Crompton Corporation Procede de transesterification continue de composes d'alcoxyorganosilicie

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* Cited by examiner, † Cited by third party
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US7791503B2 (en) * 1997-10-22 2010-09-07 Intelligent Technologies International, Inc. Vehicle to infrastructure information conveyance system and method
US6660875B1 (en) 1998-06-09 2003-12-09 Ppt Technologies, Llc Ion exchange purification of dielectric condensate precursor fluids and silicate esters such as tetraethylorthosilicate (TEOS)
US7307134B2 (en) * 2002-02-22 2007-12-11 Henkel Corporation Mixed alkoxysilyl functional polymers
EP2142631B1 (fr) * 2007-04-27 2012-03-14 The Dial Corporation Procédés de traitement de tissu dans un séchoir
JP5479971B2 (ja) * 2010-03-29 2014-04-23 花王株式会社 ケイ酸エステルの製造方法
JP5990456B2 (ja) * 2012-12-27 2016-09-14 花王株式会社 ケイ酸エステル組成物の製造方法
JP6050691B2 (ja) * 2013-01-22 2016-12-21 花王株式会社 ケイ酸エステル組成物
US9657039B2 (en) 2013-03-07 2017-05-23 National Institute Of Advanced Industrial Science And Technology Production method for alkoxysilanes
US10294251B2 (en) 2016-06-10 2019-05-21 Momentive Performance Materials Inc. Process for preparing alkoxysilanes
WO2022017598A1 (fr) * 2020-07-22 2022-01-27 Wacker Chemie Ag Silicates d'alkyle
CN115073509B (zh) * 2021-03-16 2024-02-06 中国石油化工股份有限公司 Co2调控型裂缝防气窜封堵剂及其制备方法与应用
CN115073508B (zh) * 2021-03-16 2024-05-24 中国石油化工股份有限公司 pH响应型防气窜封堵剂及其制备与应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643263A (en) * 1950-09-22 1953-06-23 California Research Corp Higher secondary-alkyl orthosilicates
GB941291A (en) * 1961-04-07 1963-11-06 Union Carbide Corp Process for the transesterification of alkoxy-containing organosilicon compounds
DE4040679A1 (de) * 1990-12-19 1992-06-25 Henkel Kgaa Verfahren zur herstellung von hellfarbigen tetraalkoxysilanen und deren verwendung
WO1993016085A1 (fr) * 1992-02-06 1993-08-19 Henkel Kommanditgesellschaft Auf Aktien Procede de fabrication de tetraalcoxysilanes de couleur claire

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917467A (en) * 1959-12-15 Certificate of correction
US4717773A (en) * 1985-10-04 1988-01-05 Kenney Malcolm E Silicate esters and organosilicon compounds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643263A (en) * 1950-09-22 1953-06-23 California Research Corp Higher secondary-alkyl orthosilicates
GB941291A (en) * 1961-04-07 1963-11-06 Union Carbide Corp Process for the transesterification of alkoxy-containing organosilicon compounds
DE4040679A1 (de) * 1990-12-19 1992-06-25 Henkel Kgaa Verfahren zur herstellung von hellfarbigen tetraalkoxysilanen und deren verwendung
WO1993016085A1 (fr) * 1992-02-06 1993-08-19 Henkel Kommanditgesellschaft Auf Aktien Procede de fabrication de tetraalcoxysilanes de couleur claire

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 82, no. 1, 6 January 1975, Columbus, Ohio, US; abstract no. 4347, BRAININ, L.B. ET AL.: "synthesis of hydroxy(polyethyleneoxy)silanes" XP002043254 *
ZH. PRIKL. KHIM. (LENINGRAD), 1974, pages 1807 - 1809 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070528A1 (fr) * 2001-03-02 2002-09-12 Crompton Corporation Procede de transesterification continue de composes d'alcoxyorganosilicie

Also Published As

Publication number Publication date
EP0915890B1 (fr) 2000-03-01
ATE190061T1 (de) 2000-03-15
JP2000500779A (ja) 2000-01-25
DE59701191D1 (de) 2000-04-06
CA2258104C (fr) 2001-12-18
JP3204987B2 (ja) 2001-09-04
CA2258104A1 (fr) 1998-01-29
US6005132A (en) 1999-12-21
DE19629760A1 (de) 1998-01-29
EP0915890A1 (fr) 1999-05-19

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